INSPECTION PROCEDURE 3: When the selector lever is moved to "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicles communication interface (V.C.I.)
  • MB991827: M.U.T.-III USB cable
  • MB991911: M.U.T.-III Main harness B

1. STEP 1. Verify the rear wiper. 

   Check that the rear wiper system works normally by operating the rear wiper switch.

   Q: Does the rear wiper operate? 

   • YES < CVT >:  Go to Step 2.
   • YES < M/T >:  Go to Step 4.
   • NO < Rear wiper does not work. >:  Refer to INSPECTION PROCEDURE 1 "REAR WIPER DOES NOT WORK AT ALL  ."
2. STEP 2. Use the scan tool MB991958 to diagnose the CAN bus lines. 

   Connect the scan tool. Refer to "DIAGNOSTIC FUNCTION ."

   Q: Is the check result normal? 

   • YES:  Go to Step 3.
   • NO:  Repair the CAN bus line (Refer to CAN BUS DIAGNOSIS CHART ).
     Fig 1: Connecting Scan Tool To Data Link Connector

     Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Use the scan tool MB991958 to diagnose other system diagnostic trouble code 

   Check that the CVT-ECU sets a diagnostic trouble code.

   Q: Is the diagnostic trouble code set? 

   • YES:  Diagnose the CVT-ECU (Refer to DIAGNOSTIC TROUBLE CODE CHART ).
   • NO:  Go to Step 10.
4. STEP 4. Connector check: B-110 Back-up light switch connector 

   Q: Is the check result normal? 

   • YES:  Go to Step 5.
   • NO:  Repair the damaged connector.
5. STEP 5. Back-up light switch check 

   Check that the back-up light switch (Refer to INSPECTION ) operates normally.

   Q: Is the check result normal? 

   • YES:  Go to Step 6.
   • NO:  Replace the back-up light switch.
6. STEP 6. Voltage measurement at the B-110 back-up light switch connector 
   1. Disconnect the connector, and measure at the wiring harness-side connector.
   2. Turn the ignition switch to the ON position.
   3. Measure the voltage between the B-110 back-up light switch < M/T > connector terminal No. 2 and body ground.

      OK: Battery positive voltage 

   Q: Is the check result normal? 

   • YES:  Go to Step 8.
   • NO:  Go to Step 7.
7. STEP 7. Check the wiring harness between B-110 back-up light switch < M/T > connector terminal No. 2 and the ignition switch (IG1). 
   NOTE: Prior to the wiring harness inspection, check intermediate connector A-10, intermediate connector C-39, and junction block connector C-313 and C-317, and repair if necessary.
   • Check the power supply line for open circuit.

   Q: Is the check result normal? 

   • YES:  Go to Step 10.
   • NO:  Repair the wiring harness.
8. STEP 8. Check ETACS-ECU connector C-304 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is ETACS-ECU connector C-304 in good condition? 

   • YES:  Go to Step 9.
   • NO:  Repair the damaged connector.
9. STEP 9. Check the wiring harness between B-110 back-up light switch < M/T > connector terminal No. 1 and C-304 ETACS-ECU connector terminal No. 2. 
   NOTE: Prior to the wiring harness inspection, check intermediate connector A-10, and repair if necessary.
   • Check the output lines for open circuit and short circuit.

   Q: Is the check result normal? 

   • YES:  Go to Step 10.
   • NO:  Repair the wiring harness.
10. STEP 10. Retest the system. 

    Check that the rear wiper operates continuously when the selector lever is moved to the R position during the rear wiper operation.

    Q: Is the check result normal? 

    • YES:  Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    • NO:  Replace the ETACS-ECU.